Ferrari already confirmed directly to Autoblog that the XX is under development. There are even spy photos of it testing at the Nürburgring (pictured above). It reportedly clocked an astonishingly fast six-minute, 35-second lap at the historic track. The latest scuttlebutt about the track-focused supercar, according to Top Gear, is that it ditches standard car's hybrid 6.3-liter V12 engine with a combined output of 949 horsepower and 663 pound-feet of torque in favor of a Formula One-derived V6 turbo hybrid. That would be a huge change but would likely cut weight. The more insane LaFerrari could debut as soon as January or February of next year.

Ferrari says it's difficult to make the XX accelerate much quicker than a standard LaFerrari, but slick tires, revised suspension and aero changes should cut lap times. A version that doesn't have to worry about road car laws and just focuses on being fast could be truly mental.

Ferrari Information

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Given that the XX cars are essentially used by Ferrari for R&D, it seems like a clever idea to chuck their Formula 1 engines in so they can develop them outside of the homologation freezes imposed on F1

Hi guys, Chris,
The car on the pictures is not the LaFerrari XX. I am getting irritated from all the speculations.
Remember this: https://www.youtube.com/watch?v=pXNLQQC_AGU
Notice the air scoop at the roof, meant for the turbo? Now this is the XX in development.
Look at all the previous XX cars and tell me do you notice that despite that they very much resemble their road legal base cars, they have completely different and radical aerodynamics. The car on these pictures is plain "regular" LaFerari. Well, probably a test prototype of some sort, but not XX car in any case. The spoiler at the back is LaFerari's stock active spoiler and this is why it is visible (extended) or not (retracted) on some pictures. There is no air scoop at the roof, therefore no V6 turbo, therefore not a XX car.
Period!

I love the idea of having real F1 engine in a car sold to clients. I know the current F1 engines are not the best in the excitement department, but nevertheless this is F1 engine. I only hope that since the XX cars are part of Ferrari's R&D program, it won't be long before we see road legal Ferrari with that F1 engine.

Only in Magic Ferrari-Land, where they think they're entitled to control how people refer to cars (and how people are allowed to buy cars, etc.). Anyone with half a brain knows that we refer to cars as "Manufacturer-then-Model". VW GTI, Ford Focus, Porsche 918, etc. But noooo, Ferrari thinks they're so special that the normal rules of human language don't apply to them.

Because it mays sense in context of what "xx" cars are. They're not street legal and Ferrari will only let you drive them on a track apparently, so why not toss a real F1 engine in their track only car?

Because it takes a dedicated pit crew and garage to run an F1 system. Everything from tire warmers to transmission lubricant heaters…..if not worse. Even a 65 V12 was pretty much hop in it, choke it or squirt it and drive it.

@SloopJohnB, actually the XX cars do come with pit crew and are being maintained by the factory since they are part of Ferrari's R&D program. I know that the current F1 engine formula is not as exiting as some previous F1 engines but this is what it is. And exiting or not the engine itself, they want to put one in close to production car, meant to develop technology for future rad legal cars, a real F1 engine, how coll is that?

I don't understand why anyone would want an iddybiddy F1 V6 turbo on a Ferrari streetcar. The F1 engines are temperamental and high output for their size, wonderful, etc., etc., but there's never been a Ferrari worth a damn that wasn't a V12, boxers are nice blah blah blah. The others are just excuses to make money.

With 200hp less than the standard LaFerrari road car engine and a lot less torque. It would be like replacing a 300hp V6 with a 200hp liter bike engine in a road car. Sure, the bike engine revs higher, sounds cooler, and is lighter, but it's a big downgrade in raw power and especially torque. The difference is that a Ferrari V12 sounds orgasmic and the new F1 V6 turbo sounds like garbage. I don't think they can simply boost the tiny 1.6 to the 800hp of the V12, at least not with it lasting more than a few laps.

And to think that a Porsche with a mere 635 hp did 6:11s -1983
30 years later many horses and technology more - Porsche 956B best ever !
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http://i1292.photobucket.com/albums/b570/Bispo_Guerra/3816227f-6454-4f7c-abd6-b21c0935b8d9_zpse9428899.jpg